Demountable rim for pneumatic tires.



C. R. GANTRELL. DBMOUNTABLB RIM PoR PNEUMATIC TIRES. APPLICATION FILED NOV.23, 1912.

1,076,744. Patented oct. 28, 1913.

bil

not/farla 'llpccltcattcn ct Letters Patent.

application tiled November at, lult.

derlei lo. 733,139,

To all whom t may concern i' l Be it known that l, @or tCliirrrnnLn, a citizen ot the United States, and resident of St. Louis, Missonri, have invented certain new and useliul improvements in De mountable Rims for Pneumatic "lires, oil which the tollowing is a specihcation containing a lull, clear, and enact description, reference being had to the accompanying drawings, forming a part hereof,

My invention relates to improvements in demountalole rines tor pneumatic tires, and the object ci my invention is to construct a rim in such manner that it may be detached trom the wheel by a relative rotary movement, and further to construct a means to secure the rim against rotary movement relative to the wheel. By such a construction l may dispense with the usual locking wedges and bolts. y

lfith the above purposes in view my invention consists in certain novel features of construction and arrangement ot parts as will be hereinafter more tully described, pointed out in the claim and illustrated by the accompanying drawings, in which- Figure l is a side elevation ot a wheel and tire provided with my improved demountable rim; Fig. 2 is a longitudinal sectional elevation through a portion ot the wheel telly and the demountable rim; Fig, 3 is a vertical sectional elevation through the wheel telly and rim; Fig. l is a plan ot a portion oit the'felly band; Fig.. is a laragmental nlan showing a portion oit the locking plate brolren away. and also illustrating the slot through which the valve-stem may move; and llig. tl is a vertical sectional ele- "ation tltroughthe plate and pins shown in lleterring by numerals to the accompanying drawings: l designates the telly ot an ordinary automdbile wheel. Secured to the periphery ot the telly 7 is a metallic band 8.v Arranged at uniform intervals on Athe band tl are the projections 9, each ot 'which inclines from a lon 'tudinal` median line downwardly toward t e surface ol the band, and each projection on the median line in clines from its rearmost end downwardly and forwardly to the surface ot the bandB As shown in Fig. Q, these projections 9 are Apreferably termed by being pressed out ot the body ot the band..

it) designates the tire rim, the torni shown being et the clencher type., Secured to tha inner tace oi the rim ltlare the uniformly spaced apart blocks Ill, the spacing ot the bloclrs being the same as the spacinnr ot the projections 9 ot the :telly band. Formed in each ci' the blocks is a cavity l2 which is shaped to receive one ot the projections 9, the cavities beingF deepest at their rearinost ends and inclininggI upwardly and outwardly troni longitudinal median lines.

ll designates an ordinary pneumatic tirecasingwhich is secured in an ordinary manv ller'in the lt).

it designates the valve-stem lor the inner tube (not shown), and l5 designates the valve-stem cap, the cap and stein each being oitn ordinary construction v lll designates a bloclr which is rigidly secured tothe telly band. This bloclr is provided with an openingl through which the valve-stem it projects and on either side oit the valve-stem opening there is a tapered opening il,

i8 designates a plate carrying a `pair ot pins 19, the lowermost ends oil which arel .rotary movement between the telly and the rim.

2t) designates a sleeve which is slipped over 4the stem let and is projected through openlllntented @ein ltd, lhl,

ings iliormed in the plate lll, the telly l and the band d, the lowermost end cil the sleeve being threaded into the opening formed in the bloclr le, This sleeve is arranged to protect the valve-stem. @ne of the openings in the lolly is slot-lil e entcnding trom the point through which 'the valve-stem entends to the point where one ot the locking pins 19 is extended through the telly, the slot permitting ot a movement oit the rim rela# tive to the hired valve-stem. When 'wholly assembled the cap 15 serves as a jamnut to `hold the sleeve 20 in place. The sleeve Q0 and the cap l5 serve to prevent the plate i8 and pins i9 from moving out ot place.

filter the wheel has been assembled as shown and described, the operation of demounting the rim is as follows: The cap 15 is first removed and the protecting sleeve 20 withdrawn, thus releasing the plate i8 with the pins i9 so that the pins may be withdrawn. This leaves the rim tree to he rotated relative to the telly band. By this ar rangement rims carryling,t inflated tires may Mill be readily detached from or attached to the vehicle wheels.

in order to dismonnt the rim rom the felly the rim is rotated relative to the felly, thus freeing the projections 9-from the cavities 12 in the blocks l1 which are secured to the rim, the extent of the rotation being at least equal to the length of the blocks 11, so that the entire rim with the blocks may be moved laterally away from the felly band.

The advantage of the peculiar shape of the projections 9 is that by'reason of their vtaper they may be more readiiy introduced to the cavities in the blocks il, so that when applying the rimthe projections 9 and tapering cavities 12 are practicaiiy self-centering.

.i claim.:

"In a demountable rim for pneumatic tires.j

a wheel having spaced apart wedge-shaped peripheral projections, a rim having peripheral Wedge-shaped cavities to receive the projections on the Wheel5 a locking block carried by the rim, a valve stern protecting sleeve secured'to said block, a plate having a pin arranged to lock the Wheel and said block against relative movements, and means for securing the plate in place, said wheel having a slot through which the sleeve is moved, substantially as shown and for the purposes stated.

In testimony whereof, have `signed myname to this specification, in presence of two subscribing witnesses.

COY RICHARD CANTRELL. T*Jiitnessesz BURTON BUNCH,

L. WALLACE. 

